I am having the same problem as George. Regardless of the input, including the examples, the input is always unrecognized on wolframalpha.com.

I noticed this yesterday evening and it continues today. Maybe it is location based because it seems like others are not seeing this problem.

There's an issue with my work network as well. Computer queries fail. It works on my phone. Tethering computer to phone also works.

I last successfully accessed this site from work in early January. I do not know what has changed--the network or the website.

You can access the mobile sit by just going directly to

http://m.wolframalpha.com

So we have changed how results get pulled into W|A to be asynchronous which is the main cause of this problem. We have discovered that certain proxy services like:

https://chrome.google.com/webstore/detail/data-saver/pfmgfdlgomnbgkofeojodiodmgpgmkac/related?hl=en

https://chrome.google.com/webstore/detail/data-compression-proxy/ajfiodhbiellfpcjjedhmmmpeeaebmep?hl=en

are altering headers that our server doesn't like. So I would expect that this is a more general problem than those extensions when using proxy services or accessing the site from certain networks that utilize proxy services. But in general if your requests are getting routed through anything that is modifying headers of the requests we may have a problem.

We are still investigating the issue and seeing what we can do to address these issues from our side.

It seems to work fine for me at the moment 1:30 PM East coast USA time Tuesday Feb 2.

Still working fine for me (Safari, Chrome, and Firefox, though the browser should not make any difference). I believe that W|A has server colocations in two different places. It is possible that there are issues with one of them--where are you located? However,

Also, if you have Mathematica, try executing

WolframAlpha["1+1"]

from a notebook.

Hopefully the WRI Wolfram|Alpha developers have taken notice of this thread (I am having no problems from Boston, MA).

To help them, each of you who are having issues should perhaps post your location (and your ISP? and your IP address? --the latter you may not wish to pose for privacy reasons)) so that they have some additional information to debug this.

Good!

I am located in Munich. For me it worked until some weeks ago. It doesn´t work if I´ve switched off Adblock, so that´s not it.

All queries through the browser-accessed website are failing in the same manner as Dustin's above. Current location: at work in Greenville, South Carolina.

However the Wolfram Alpha App on my iPhone, currently using Cell Data (not Wifi) is not having this problem. Perhaps some server-side security gone awry?

I'll hazard a guess that it's some sort of server-side script that can't get back to the client through a thick firewall and calls no joy.

The Wolfram|Alpha team is aware of several issues that users are experiencing due to extensive recent updates, and we are hoping to resolve things quickly. Please patiently bear with us until everything is back to normal.

In the meantime, if you’d like to provide any specific feedback about what you’re experiencing, it would always be appreciated. You can contact info@wolframalpha.com with whatever issues you are seeing, steps to reproduce, OS/browser, account information (if applicable), etc.

As far as I can tell, the problem seems to be with Microsoft browser, IE and Edge; it works fine with other browsers.